From 933c762371fe8cc6e2ef5d00d6866f4924852fed Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Fri, 31 Jul 2009 01:52:50 +0000
Subject: Manage MachineFunctions with an analysis Pass instead of the
 Annotable mechanism. To support this, make MachineFunctionPass a little more
 complete.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77654 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineFunctionAnalysis.cpp | 45 +++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 lib/CodeGen/MachineFunctionAnalysis.cpp

(limited to 'lib/CodeGen/MachineFunctionAnalysis.cpp')

diff --git a/lib/CodeGen/MachineFunctionAnalysis.cpp b/lib/CodeGen/MachineFunctionAnalysis.cpp
new file mode 100644
index 0000000000..8b7dba8121
--- /dev/null
+++ b/lib/CodeGen/MachineFunctionAnalysis.cpp
@@ -0,0 +1,45 @@
+//===-- MachineFunctionAnalysis.cpp ---------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the definitions of the MachineFunctionAnalysis members.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineFunctionAnalysis.h"
+#include "llvm/CodeGen/MachineFunction.h"
+using namespace llvm;
+
+// Register this pass with PassInfo directly to avoid having to define
+// a default constructor.
+static PassInfo
+X("Machine Function Analysis", "machine-function-analysis",
+  intptr_t(&MachineFunctionAnalysis::ID), 0,
+  /*CFGOnly=*/false, /*is_analysis=*/true);
+
+char MachineFunctionAnalysis::ID = 0;
+
+MachineFunctionAnalysis::MachineFunctionAnalysis(TargetMachine &tm,
+                                                 CodeGenOpt::Level OL) :
+  FunctionPass(&ID), TM(tm), OptLevel(OL), MF(0) {
+}
+
+bool MachineFunctionAnalysis::runOnFunction(Function &F) {
+  assert(!MF && "MachineFunctionAnalysis already initialized!");
+  MF = new MachineFunction(&F, TM);
+  return false;
+}
+
+void MachineFunctionAnalysis::releaseMemory() {
+  delete MF;
+  MF = 0;
+}
+
+void MachineFunctionAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+}
-- 
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